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Updated: Dec 5, 2025

Fragility Assessment of Bovine Cortical Bone Using Scratch Tests

Fragility Assessment of Bovine Cortical Bone Using Scratch Tests

Published on: November 30, 2017

The scratch collapse test: A systematic review.

Urška Čebron¹, Catherine M Curtin¹

¹Department of Surgery, Palo Alto Veterans Hospital, Division of Plastic Surgery, Stanford University, Suite 400, 770 Welch RD, Palo Alto, CA 94304, United States.

Journal of Plastic, Reconstructive & Aesthetic Surgery : JPRAS

|October 15, 2020

Summary

This summary is machine-generated.

The Scratch Collapse Test (SCT) shows promise for diagnosing peripheral nerve compression and locating the exact site of entrapment. While its positive predictive values and specificity are high, sensitivity and negative predictive values vary, suggesting it should supplement other diagnostic methods.

Keywords:

Nerve Compression Nerve Examination Scratch Collapse Test Systematic Review

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Area of Science:

Neurology
Orthopedics
Physical Medicine and Rehabilitation

Background:

Nerve compression diagnosis involves multiple clinical and diagnostic tools.
Provocative tests are crucial for identifying peripheral nerve entrapment.
The Scratch Collapse Test (SCT) is a newer provocative maneuver for localizing nerve compression.

Purpose of the Study:

To systematically review existing literature on the diagnostic reliability of the SCT for entrapment neuropathy.
To assess the performance of the SCT in identifying and localizing peripheral nerve compression.

Main Methods:

Systematic literature review of studies evaluating the SCT.
Analysis of diagnostic values (sensitivity, specificity, positive predictive value, negative predictive value) from eligible studies.
Inclusion of ten articles, with five providing sufficient numerical data for quantitative analysis.

Main Results:

High positive predictive values (0.71–0.99) and specificity (0.6–0.99) were observed for the SCT.
Variable results were found for negative predictive values (0.15–0.92) and sensitivity (0.24–0.77).
The SCT demonstrated versatility across different nerve entrapments and localization capabilities.

Conclusions:

The SCT shows potential as a clinical diagnostic tool for entrapment neuropathy.
Due to variability in reported values, the SCT should be used as an adjunct to, not a replacement for, established diagnostic approaches.
Further research may refine the SCT's role in the diagnostic workup of nerve compression syndromes.